A transfer function-based digital twin modeling method and system for radio frequency devices

By constructing the transfer function of RF devices and using the cubic spline interpolation algorithm to generate continuous curves, the problems of low simulation accuracy and digital link adaptation in digital twin modeling of RF devices are solved, realizing the characterization and high-precision simulation of parameter coupling relationships.

CN121920107BActive Publication Date: 2026-06-26SHANGHAI HOLLYWELL ELECTRONICS SYST TECH
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Patent Information

Application Number
CN202610377146.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-26
Publication Date
2026-06-26
Estimated Expiration
2046-03-26

AI Technical Summary

Technical Problem

Existing digital twin modeling methods for radio frequency devices suffer from low simulation accuracy, lack of continuous characteristic representation across the entire frequency band, and digital link interaction barriers. They are unable to effectively characterize the coupling relationship between radio frequency device parameters, resulting in large deviations between simulation results and actual results.

Method used

The transfer function of the RF device is constructed using a cubic spline interpolation algorithm. Continuous curves of transmission gain, phase, and noise figure are generated through the interpolation algorithm. By combining AM-AM and AM-PM data, linear and nonlinear transfer functions are constructed to characterize the coupling relationship between parameters. The operating range is determined based on the input signal power, and adaptation processing is performed.

Benefits of technology

It improves the modeling accuracy of RF devices across the entire frequency band, realizes the characterization of coupling relationships between parameters, solves the digital link adaptation barrier, and improves the accuracy and real-time performance of simulation results.

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Abstract

The application discloses a kind of radio frequency device digital twin modeling methods based on transfer function. Cubic spline interpolation algorithm is used to obtain the characteristic curve of radio frequency device with continuous change of working frequency of radio frequency signal, and AM-AM curve and AM-PM curve with continuous change of input power of radio frequency signal at each discrete frequency point. Linear transfer function and nonlinear transfer function of radio frequency device are constructed according to the above curves. According to the input signal power of radio frequency device, the working area of radio frequency device is judged, and different transfer functions or fixed parameters are called to obtain intermediate signals. Complex noise is generated, and the same processing method as the input signal of radio frequency device is used for complex noise. Finally, the output signal is obtained. The application realizes the coupling correlation of noise figure and gain compression of radio frequency device.
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